Heat-resistant polyethylene ball valve capable of discharging sewage through middle cavity pressure relief

Abstract

This utility model discloses a heat-resistant polyethylene ball valve with cavity pressure relief and sewage discharge capability, relating to the field of polyethylene valve technology. It includes a valve body, a valve seat within the valve body, a valve ball on the valve seat, end pipes connected to both ends of the valve body, a valve stem at the top of the valve body connected to the valve ball, an actuator at the top of the valve stem, and a valve cavity formed between the valve ball and the valve body. A sewage discharge pipe is located on the outside of the valve body, communicating with the valve cavity inside the valve body. A pressure relief and sewage discharge valve is installed on the sewage discharge pipe to control its opening and closing. This utility model, through the sewage discharge pipe located on the outside of the valve body, connected to the valve cavity formed between the valve body and the valve ball, allows overpressure media and contaminants within the valve cavity to be discharged outside the valve body, thereby ensuring stable internal pressure and preventing valve body rupture, valve operation difficulties or failures, potential leaks, and safety risks.

Description

Technical Field

[0001] This utility model relates to the field of polyethylene valve technology, specifically to a heat-resistant polyethylene ball valve that can release pressure and discharge sewage through the central cavity. Background Technology

[0002] In recent years, heat-resistant polyethylene ball valves have seen a year-on-year increase in application in heating networks and domestic hot water networks due to their excellent corrosion resistance, light weight, good flexibility, convenient connection, low fluid resistance, long service life, and high cost performance.

[0003] Currently, heat-resistant polyethylene ball valves have the following problems. When the valve is closed, the cut-off medium (liquid or gas) remains trapped in the cavity (i.e., the "middle cavity") around the ball inside the valve body. If the ambient temperature rises, the medium trapped in the middle cavity will expand due to heat. Because the strength and rigidity of PE material are much lower than those of metal materials, if the pressure in the middle cavity rises to exceed the valve body's withstand limit (or the design pressure of the PE material at that temperature), it may lead to valve body expansion, deformation, or even rupture, difficulty in valve operation or failure, potential leakage, and safety risks. Utility Model Content

[0004] Therefore, this utility model provides a heat-resistant polyethylene ball valve with a cavity for pressure relief and sewage discharge to solve the problems existing in the above-mentioned technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A heat-resistant polyethylene ball valve with cavity pressure relief and sewage discharge capability includes a valve body, a valve seat disposed within the valve body, a valve ball disposed on the valve seat, end pipes connected to both ends of the valve body, a valve stem disposed at the top of the valve body, the valve stem being connected to the valve ball, an actuator disposed at the top of the valve stem, a valve cavity being formed between the valve ball and the valve body, a sewage discharge pipe disposed on the outside of the valve body, and the sewage discharge pipe communicating with the valve cavity inside the valve body, and a pressure relief sewage discharge valve disposed on the sewage discharge pipe for controlling the opening and closing of the sewage discharge pipe.

[0007] Optionally, the drain pipe is arranged along one of the diameter directions of the valve ball, and the drain pipe passes through the side wall of the valve body and connects to the valve cavity. The end of the drain pipe located inside the valve body is the inlet, and the end of the drain pipe located outside the valve body is the outlet, and the height of the outlet is lower than the height of the inlet.

[0008] Optionally, the position of the inlet inside the valve cavity corresponds to the position on the lower side of the upper flow channel of the valve ball.

[0009] Optionally, the pressure relief and drain valve is a ball valve, butterfly valve, or gate valve.

[0010] Optionally, the sewage pipe is made of heat-resistant polyethylene and is integrally formed with the valve body.

[0011] This utility model has at least the following beneficial effects:

[0012] This invention utilizes a drain pipe located on the outside of the valve body, which connects to the valve cavity formed between the valve body and the valve ball. This drain pipe allows overpressure media and contaminants within the valve cavity to be discharged to the outside of the valve body, thereby ensuring stable pressure inside the valve body and preventing valve rupture, valve operation difficulties or failures, potential leaks, and safety risks. Attached Figure Description

[0013] To more clearly illustrate the prior art and the present invention, the accompanying drawings used in the description of the prior art and the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other drawings from the provided drawings without any creative effort.

[0014] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which this utility model can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0015] Figure 1 This is a first-view structural diagram of an embodiment of the present invention;

[0016] Figure 2 This is a second-view structural schematic diagram of an embodiment of the present invention;

[0017] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of section AA;

[0018] Figure 4 for Figure 2 Schematic diagram of the cross-sectional structure of the middle BB section.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Actuator; 2. Valve stem; 3. Actuator sealing ring; 4. Valve stem sealing ring; 5. End pipe; 6. Valve ball sealing ring; 7. Valve seat; 8. Valve ball; 9. Valve body; 10. Drainage pipe; 11. Pressure relief drain valve; 12. Valve cavity. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0022] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. The terms "first," "second," "third," "fourth," etc. (if present), in the specification, claims, and accompanying drawings of this utility model are intended to distinguish the objects they refer to. For solutions with a sequential flow, this terminology need not be interpreted as describing a specific order or sequence; for solutions with device structures, this terminology does not distinguish between matters of importance or positional relationships.

[0023] Furthermore, the terms “comprising,” “having,” and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are expressly listed, but may also include other steps or units that are not expressly listed but are inherent to these processes, methods, products, or devices, or steps or units added based on further optimizations of the inventive concept.

[0024] like Figures 1-4 As shown, this utility model discloses a heat-resistant polyethylene ball valve with a cavity-type pressure relief and sewage discharge capability. It includes a valve body 9, a valve seat 7 inside the valve body 9, a valve ball 8 on the valve seat 7, end pipes 5 connected to both ends of the valve body 9, a valve stem 2 on the top of the valve body 9, the valve stem 2 connected to the valve ball 8, and an operator 1 on the top of the valve stem 2. The valve body 9 is characterized in that a valve cavity 12 is formed between the valve ball 8 and the valve body 9, a sewage discharge pipe 10 is provided on the outside of the valve body 9, and the sewage discharge pipe 10 communicates with the valve cavity 12 inside the valve body 9. A pressure relief and sewage discharge valve 11 is provided on the sewage discharge pipe 10 to control the opening and closing of the sewage discharge pipe 10.

[0025] The valve body 9, valve seat 7, end pipe 5 and valve ball 8 mentioned above are all made of heat-resistant polyethylene. A valve ball sealing ring 6 is provided between the valve ball 8 and the valve body 9. The valve stem 2 is fixedly connected to the valve ball 8, which drives the valve ball 8 to rotate. A valve stem sealing ring 4 is provided between the valve stem 2 and the valve body 9. The operator 1 is provided on the valve stem 2 and is used to operate the valve stem 2 to rotate. The operator 1 is connected to the valve body 9 and can rotate on the valve body 9. An operator sealing ring 3 is provided between the operator 1 and the valve body 9.

[0026] When the flow channel inside the valve ball 8 is rotated to the position corresponding to the two end pipes 5, it is connected to the end pipes 5. When the flow channel of the valve ball 8 is misaligned with the end pipes 5, the valve cavity 12 is formed between the end face of the flow channel and the inner wall of the valve body 9.

[0027] The aforementioned sewage pipe 10 is configured such that one end is inserted into the valve body 9 and placed inside the valve cavity 12, while the other end is placed outside the valve body 9. This allows for the discharge of overpressure media and contaminants from the valve cavity 12. A pressure relief sewage valve 11 is installed on the sewage pipe 10 to control the opening and closing of the sewage pipe 10. When the ball valve is in the open state (the ball valve flow channel is connected to the end pipe 5), the pressure relief sewage valve 11 is closed. When the ball valve is in the closed state, the pressure relief sewage valve 11 can be opened to discharge contaminants from the valve cavity 12.

[0028] In a further embodiment, the drain pipe 10 is arranged along one of the diameter directions of the valve ball 8, and the drain pipe 10 passes through the side wall of the valve body 9 and connects to the valve cavity 12. The end of the drain pipe 10 located inside the valve body 9 is the inlet, and the end of the drain pipe 10 located outside the valve body 9 is the outlet, and the height of the outlet is lower than the height of the inlet.

[0029] The aforementioned sewage pipe 10 can be installed in the lower half of the outer side of the ball valve and inclined along one diameter of the ball valve. The sewage pipe 10 is higher inside and lower outside, which can conveniently discharge sewage and overpressure medium from the valve cavity 12.

[0030] In addition, to further improve the sewage discharge effect, the position of the water inlet inside the valve cavity 12 corresponds to the position of the lower side of the upper flow channel of the valve ball 8.

[0031] By positioning the inlet of the sewage pipe 10 at the lowest point of the valve cavity 12 inside the valve body 9, sewage and overpressure media can be discharged more effectively, and the waste can be discharged more cleanly.

[0032] The pressure relief and drain valve 11 is a ball valve, butterfly valve, or gate valve.

[0033] For the on / off control of the sewage pipe 10, a suitable valve can be selected according to actual needs. In addition to the three types of valves mentioned above, other valves that can achieve the same effect can also be selected, which will not be elaborated here.

[0034] The sewage pipe 10 is made of heat-resistant polyethylene and is integrally formed with the valve body 9.

[0035] The drain pipe 10 can be made of the same heat-resistant polyethylene material as the valve body 9, and the drain pipe 10 and the valve body 9 can be integrally molded to ensure the stability of the drain pipe 10 and the sealing effect.

[0036] This utility model provides a dedicated pressure relief and sewage discharge channel on the valve body 9 of the heat-resistant polyethylene ball valve. When the pressure relief and sewage discharge valve 11 is opened, the overpressure medium and dirt in the valve cavity 12 are discharged to the outside of the valve through the pressure relief and sewage discharge pipe 10.

[0037] The above specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0038] The technical features of the above embodiments can be combined in any way (as long as there is no contradiction in the combination of these technical features). For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described; these embodiments not explicitly written should also be considered to be within the scope of this specification.

[0039] The present invention has been described in a relatively specific and detailed manner above through general description and specific embodiments. It should be noted that, without departing from the concept of the present invention, various modifications and improvements can be made to these specific embodiments, all of which fall within the scope of protection of this application. Therefore, the scope of protection of this patent application should be determined by the appended claims.

Claims

1. A heat-resistant polyethylene ball valve for cavity pressure relief and sewage discharge, comprising a valve body, a valve seat disposed within the valve body, a valve ball disposed on the valve seat, end pipes connected to both ends of the valve body, a valve stem disposed at the top of the valve body, the valve stem being connected to the valve ball, and an actuator disposed at the top of the valve stem, characterized in that: The valve ball and the valve body form a valve cavity. A drain pipe is provided on the outside of the valve body and is connected to the valve cavity inside the valve body. A pressure relief drain valve is provided on the drain pipe to control the opening and closing of the drain pipe.

2. The heat-resistant polyethylene ball valve with cavity pressure relief and sewage discharge according to claim 1, characterized in that: The drain pipe is arranged along one of the diameter directions of the valve ball, and the drain pipe passes through the side wall of the valve body and connects to the valve cavity. The end of the drain pipe located inside the valve body is the inlet, and the end of the drain pipe located outside the valve body is the outlet. The height of the outlet is lower than the height of the inlet.

3. The heat-resistant polyethylene ball valve with cavity pressure relief and sewage discharge according to claim 2, characterized in that: The position of the inlet inside the valve cavity corresponds to the position on the lower side of the upper flow channel of the valve ball.

4. The heat-resistant polyethylene ball valve with cavity pressure relief and sewage discharge according to claim 1, characterized in that: The pressure relief and drain valve is a ball valve, butterfly valve, or gate valve.

5. A heat-resistant polyethylene ball valve with cavity pressure relief and sewage discharge according to claim 1, characterized in that: The sewage pipe is made of heat-resistant polyethylene and is integrally formed with the valve body.

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